/* css/style.css (ไฟล์ใหม่) */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --light-bg: #1e293b;
    --warning-color: #f59e0b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--light-bg) 100%);
    color: #fff;
    overflow-x: hidden;
    min-height: 100vh;
}

/* === 1. PRELOADER === */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    opacity: 1;
    visibility: visible;
}
.preloader .spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === 2. NAVBAR (Glassmorphism) === */
.navbar {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
}
.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.navbar-toggler { border-color: rgba(255,255,255,0.2); }
.navbar-toggler-icon { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e"); }

/* === 3. OFF-CANVAS (เมนูสไลด์) === */
.offcanvas {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(15px);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
}
.offcanvas-header { border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.offcanvas-title { color: #fff; font-weight: bold; }
.offcanvas-body .navbar-nav .nav-link { 
    font-size: 1.5rem; 
    font-weight: 500; 
    color: rgba(255, 255, 255, 0.8); 
    padding: 1rem; 
    text-align: center; 
    border-radius: 10px; 
    transition: all 0.3s ease; 
}
.offcanvas-body .navbar-nav .nav-link i { width: 30px; }
.offcanvas-body .navbar-nav .nav-link:hover { color: #fff; transform: scale(1.05); background: rgba(255, 255, 255, 0.05); }
@keyframes slideInFromRight { from { opacity: 0; transform: translateX(50px); } to { opacity: 1; transform: translateX(0); } }
.offcanvas-body .nav-item { opacity: 0; }

/* === 4. LANDING PAGE (Hero) === */
.animated-bg { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; overflow: hidden; }
.floating-shape { position: absolute; border-radius: 50%; filter: blur(60px); opacity: 0.3; transition: transform 0.2s ease-out; }
.shape-1 { width: 400px; height: 400px; background: var(--primary-color); top: -100px; left: -100px; }
.shape-2 { width: 300px; height: 300px; background: var(--accent-color); bottom: -150px; right: -100px; }
.shape-3 { width: 350px; height: 350px; background: var(--secondary-color); top: 50%; right: 10%; }

.hero-section { min-height: 100vh; display: flex; align-items: center; padding: 2rem 0; }
.hero-title { font-size: 3.5rem; font-weight: 800; margin-bottom: 1.5rem; background: linear-gradient(135deg, #fff, var(--primary-color)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; opacity: 0; }
.hero-subtitle { font-size: 1.3rem; color: rgba(255, 255, 255, 0.8); margin-bottom: 2rem; animation: fadeInUp 1s ease-out 0.2s both; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

/* === 5. LOGIN/REGISTER CARD (หน้า Landing) === */
.login-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease-out 0.4s both;
    transition: transform 0.3s ease;
    display: none; 
}
.login-card.active { display: block; }
.login-card:hover { transform: translateY(-5px); }

/* === 6. DASHBOARD CARD (หน้า Home) === */
.dashboard-card, .content-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
}
.credit-display {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* === 7. FORM & BUTTONS === */
.form-control { 
    background: rgba(15, 23, 42, 0.5); 
    border: 1px solid rgba(255, 255, 255, 0.1); 
    color: #fff; 
    padding: 0.75rem 1rem; 
    border-radius: 10px; 
    transition: all 0.3s ease; 
}
.form-control:focus { background: rgba(15, 23, 42, 0.7); border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1); color: #fff; }
.form-control::placeholder { color: rgba(255, 255, 255, 0.5); }
.btn-primary, .btn-warning { 
    border: none; 
    padding: 0.75rem 2rem; 
    border-radius: 10px; 
    font-weight: 600; 
    transition: all 0.3s ease; 
    position: relative; 
    overflow: hidden; 
}
.btn-primary { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); }
.btn-warning { background: linear-gradient(135deg, var(--warning-color), var(--accent-color)); }
.btn-primary:hover, .btn-warning:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4); }

/* === 8. FEATURES & FOOTER === */
.fade-in { opacity: 0; animation: fadeInUp 0.6s ease-out forwards; }
.feature-icon { width: 70px; height: 70px; background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); border-radius: 15px; display: flex; align-items: center; justify-content: center; font-size: 2rem; margin-bottom: 1rem; transition: transform 0.3s ease; }
.feature-card:hover .feature-icon { transform: rotate(10deg) scale(1.1); }
.feature-card { background: rgba(30, 41, 59, 0.4); backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 15px; padding: 2rem; transition: all 0.3s ease; height: 100%; }
.feature-card:hover { transform: translateY(-10px); border-color: var(--primary-color); box-shadow: 0 15px 40px rgba(99, 102, 241, 0.2); }
footer { background: rgba(15, 23, 42, 0.8); backdrop-filter: blur(10px); border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 2rem 0; margin-top: 4rem; }

/* === 9. SWEETALERT2 THEME === */
.swal2-popup { background: rgba(30, 41, 59, 0.8) !important; backdrop-filter: blur(20px) !important; border: 1px solid rgba(255, 255, 255, 0.1) !important; border-radius: 20px !important; }
.swal2-title { color: #fff !important; }
.swal2-html-container { color: rgba(255, 255, 255, 0.8) !important; }
.swal2-confirm { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important; border: none !important; box-shadow: none !important; }
.swal2-error-icon .x-mark { border-color: #ec4899 !important; }
.swal2-warning-icon { border-color: var(--warning-color) !important; color: var(--warning-color) !important; }
.swal2-info-icon { border-color: var(--primary-color) !important; color: var(--primary-color) !important; }
.swal2-timer-progress-bar { background: var(--primary-color) !important; }

/* === 10. RESPONSIVE === */
@media (max-width: 991px) { .hero-section { text-align: center; } .hero-section .d-flex { justify-content: center; } }
@media (max-width: 768px) { .hero-title { font-size: 2.5rem; } .hero-subtitle { font-size: 1.1rem; } .login-card { padding: 2rem; } }